Telegraph-sounder



J. W. JACKSON.

TELEGRAPH SOUNDER. w APPLICATION Fl LED MAY 21, 1919.

Patented Feb. 3,1920.

2 SHEETSSHEET I WITNESSES Z INVENTOR J M. Jacizsazz ATTORNEYS J. W. JACKSON.

TELEGRAPH SOUNDER.

APPLICATION FILED MAY 21, 1919.

Patented Feb. 3, 1920.

2 SHEETSSHEET 2- INVENTOR J 6!]. Jackson UNITED STATES PATENT OFFICE,

JOHN W. JACKSON, 0]? HENRYETTA, OKLAHOMA.

TELEGRAPH-SOUNDER.

, To all whom it may concern;

Be it known that I, J OHN W. Jackson, a citizen of the United States, and a resident of Henryetta, in the county of Okmulgee and State of Oklahoma, have invented certain new and useful Improvements in 'lelegraph-Sounders, of which the following is a specification.

My invention is an improvement .in telegraph Sounders, and has for its object to provide a sounder for a telegraph relay which will dispense with the local battery and extra sounder magnets at each station, and enable the ordinary relay with its relatively feeble power to produce loud and distinct signals, without impairing the eiiiciency and certain action of the armature relay.

In the drawings:

Figure 1 is a top plan view of the improved instrument;

Fig. 2 is a side view;

Fig. 3 is a longitudinal section of the case of the auxiliary sounder arm;

Fig. 1 is a sect-ion at right angles to Fig. 3;

Fig. 5 is a perspective view showing a modified mounting of sounder box.

In the embodiment of the invention shown in Figs. 1 to l, inclusive, the relay is of usual construction, consisting of the magnets 1 which are mounted on a suitable base 2 and with which cooperates the armature 3, the movement of the armature being limited by the usual set screws 4. With the usual relay, the armature is drawn away from the magnets by a resilient member, and the magnets are adjusted toward and from the armature by the usual set screw 5 and spring 6, the spring moving the mag-' nets toward the armature while the screw 5 draws them away from the armature.

The improvement comprises a. box or case 7 of wood or like resonant material, and within this box is supported an arm 8, the said arm having a cross shaft 9 near one end, which is held in inwardly extending stepped bearings 10 on the side walls of the box The arm is mounted to swing freely, and it is limited-in its swinging movement by contact screws 10 and 11. These screws are threaded into nipples 12 which are held in the top and bottom walls of the box, and the heads of the screws are arranged to contact with the arm 8 as it swings.

Each screw extends through the nipple,

Specification of Letters Patent.

Patented Feb. 3, 1920.

Application filed May 21, 1919. Serial No. 298,680.

and has a head 13 at its outer end, and a lock nut 1 is threaded on to each screw outside of the nipple and adjacent to the head. Thus by turning the screws the distance to which the arm 8 swings may be adjusted, and the points of contact may be changed toprovide for the best results. After adjustment, the screws may be locked by the lock nuts. inother nipple 15 is held in an opening in the top of the casing and through this nipple is threaded a screw 16. This set screw has a pin which engages within the upper end of a coil spring 17, whose lower end presses against the arm 8 near the shaft 9, in a direction to throw the free end of the arm upwardlv into contact with the screw 11. u

The arm has a hook 18 on its under side, on the opposite side of the shaft 9 from th screws 8 and 11, and there is a connection between this hook and the hook 19 of the armature with which the usual spring is engaged. This connection may be wire -20, as shown, or it may be any other suitable connection, as, for instance, catgut, silk or the like.

In operation, when the armature lever 3 is drawn toward the magnets, the arm S will be swung downwardly, striking the screw 10. As soon as the armature lever moves away from the coil the lever 8 will be forced upward by the spring 17 at its free end. Thus the relatively feeble movement of the armature lever will be transmitted to the arm 8, and the resonant box will amplify the sound of the striking arm producing thus clear and legible signals. As shown, the box has openings 21 and 22 at its ends, for perniitting the free exit of the sound vibrations.

The construction shown in Figs. 1 to 4 is supported on the base 2 of the relay by a bracket comprising a body :13 which is secured to the base and arms 24: and 25 upon which the box 7 rests. The arm 25, as shown, is forked, and the screw 10 at its head is received between the arms of the fork, the lock nut and the bottom of the box engaging the arm. The other end of the box rests upon the arm 24. It is obvious, however, that the box might be supported on the base in any suitable or desired manner.

For instance, in Fig. 5 the box 7 which is similar to the box 7 of. F ig. 1 has brackets 26 at its opposite sides and at the end adjacent to the relay, the said brackets being secured to the box in any suitable manner, as, for instance, by gluing. The bottoms of these brackets are adapted to rest upon the relay base and to be secured thereto in any suitable manner, as, for instance, by gluing or in an other way. In both constructions the liox is spaced above the relay, and the box 7 has curved slots 27 in its bottom, somewhat resembling those of a violin.

I claim:

In combination with the relay and the armature lever thereof, of a resonator or amplifier comprising a sounding lever pivoted near one end, contact screws arranged on opposite sides of the other end for engagement by the lever, a spring engaging the said lever near its pivotal connection and normally acting to hold the lever in contact with one of the screws, and a connection between the lever and the armature lever for moving said lever in the opposite direction when the armature lever is drawn toward the coils of the relay, and a resonator box inclosing the lever, the contact screws and the spring.

JOHN W. JACKSON. 

